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21031 (1989 TO15)
Classification: Main-belt Asteroid          SPK-ID: 2021031
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2327730065343318 4.4094e-08  
a 2.309316423353558 1.0599e-08 au
q 1.77176989645044 9.8358e-08 au
i 2.581493578959979 6.0504e-06 deg
node 199.4533373782067 0.00011362 deg
peri 221.1856632123021 0.00011521 deg
M 198.3253496797425 1.5608e-05 deg
tp 2458176.155982828722
(2018-Feb-26.65598283)
5.6639e-05 JED
period 1281.809816244109
3.51
8.825e-06
2.416e-08
d
yr
n .2808528967697039 1.9336e-09 deg/d
Q 2.846862950256675 1.3067e-08 au
  Orbit Determination Parameters
   # obs. used (total)      846  
   data-arc span      9690 days (26.53 yr)  
   first obs. used      1989-10-03  
   last obs. used      2016-04-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51384  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:35:59  

Additional Information
 Earth MOID = .783772 au 
 Jupiter MOID = 2.49857 au 
 T_jup = 3.548 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.7 mag n/a MPO337435  

21031 (1989 TO15)          Discovered 1989-Oct-03 by Debehogne, H. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1989 TO15 = 1994 CW2 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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